1.

Ina right circular cone, the vertical height is 12 , the radius is 5. Find the slant height.​

Answer»

GIVEN that,

Radius of the cone = 5cm

Vertical height of the cone = 12 CM

Slant height of the cone = ?

Lets CONSIDER ΔOAB as Right angle triangle

As per pythagrous THEROM,

OA^2 + AB^2 = OB^2

(12cm)^2 + (5cm)^2 = OB^2

144cm + 25 cm = OB^2

169cm = OB^2

√169 cm = OB

13 cm = OB

Therefore, the slant height of the cone is 13cm.

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